Try-square



Patented Nov. 6., 1888.

lllll//llllllllllll/llll/ll R. HAYDEN TRY SQUARE.

(N Model.)

. stud.

NITED STATES PATENT FFIC.

RANDOLPH HAYDEN, OF HADDAM, CONNECTICUT.

TRY-SQUARE.

SPECIFICATION forming part of Letters Patent No. 392,426, dated November6, 1888.

To all whom it may concern.-

Beit known that I, RANDOLPH HAYDEN, of Haddam, in the county ofMiddlesex and State of Connecticut, have invented an Improvement inTrySquares for Carpenters, Machinists, and Others, of which vthefollowing is a specification.

p Try-squares have heretofore been made with a blade of sheet metal, theedges of which are accurately trued, and such blade has been receivedinto a head-piece, sometimes slotted for its reception and sometimesmade in two parts set together, and such blade has usually been held inplace by rivets passing through both the head and the blade; butinpractice it is found that in the riveting operation the blade is veryliable to become untrue and out of square with the head. An efforthasbeen made to overcome this difficulty by soldering the blade into thehead; but in so doing the expansion by heat is liable to render theblade out of true, and the soldering is not strong, and the blade isliable to become loose.

My present invention is intended to obviate these difficulties; and itconsists inthe coinbination,with the blade having a hole through thesame at its intersection with thehead, ofthe head-piece having a studthat passes into` said hole in the blade and a square shoulder upon thehead, against which one edge of the blade is pressed forcibly in the actof passing the blade into its place and pressing it over the alsoconstruct a head-piece in the peculiar manner hereinafter described.

In the drawings, Figure 1 is aplan view of the try-square with thecap-plate of the head removed. Fig. 2 is asection through the head atthe line x, Fig. l; and Fig. 3 is a partial plan showing a modificationin the construction of the head.

The blade A is to be of any desired size or length, and it is to beprovided with ahole, 2,

near one end at that portion of the blade that' blade, and the parts ofthis head are preferably of metal and cast hollow. Upon the part 3 ofthe head is a stud, 5, the size of which corresponds, or nearly so, tothe size of the Application filed March 26, 1888. Serial No. 268,492.(No model.)

hole 2 in the blade A,and there is a transverse shoulder, 6, across thehead, which shoulder is to be formed by a suitable tool or machine, soas to be square across such head and perfectl y true, and the distancebetween this shoulder and the stud 5 is to be such that when the blade Ais applied with one edge thereof against this shoulder 6 the stud 5 willpass through the hole 2 in the blade A; but in forcing the blade downdat against the part 3 of the headpiece sufficient force will have to beapplied to cause the edge of the blade A to bind or press very firmlyagainst the shoulder 6. This is more easily accomplished by having thehole 2 slightly larger than the size of the stud 5, and having such holebored in the blade A in such a position that the metal is slightly widerbetween the hole and the edge of the blade than the distance between theshoulder 6 and the stud 5, so that when the blade is held with its edgeagainst the shoulder 6 it can be forced down into its place; but theside of the stud 5 nearest to the shoulder 6 will slightly bed itselfinto the metal of the blade A, and thereby render the parts perfectlytight and hold the blade from moving laterally within the head.

The cap portion 4 of the head is adapted to receive the projecting upperend of the stud 5, and by preference there is a second stud, 7, enteringthe recess in the under side of the portion 4 of the head, so as to holdthe parts 3 and 4 accurately in position, the one to the other, and itis preferable to face off the adjacent surface of the parts 3 and 4, andturn o the exterior surface of the studs 5 and 7, and bore out therecess in the part 4 of the headpiece, and set such parts together, andthen true off the exterior surface of the head, and then dress theshoulder 6 true to the exterior surface of the head, so as to preparethe head for the reception of the blade A, as before described, andthere are to be holes through the head at the studs 5 and 7 for thereception of rivets or screws 9 and 10, whereby the parts of the headwill be rnily secured together.

In sonne instances a separate plate, corresponding in thickness to thethickness of the blade A, will be introduced between the two parts 3 and4 of the head, as seen in Fig. 2, such plate l2 being held by the stud 7and by a second stud, 13, and the end of the plate 12 IOO adjacent tothe blade A forms the shoulder G, the manner in which the parts areprepared and put together remaining the saine as before described.

Should it be desired to make provision for adjusting the blade A in caseof any inaccuracy in the shoulder 6, screws 15 will be applied, so as topass through the metal at the shoulder 6, with their ends in contactwith the edge of the blade A. By the setting up of these screws theblade A can be adjust-ed so as to be perfectly square with thehead-piece ll, and these screws may be used to compensate any looseucssthat might otherwise exist of the blade between the shoulder G and thesind I claim as my inventionl. The combination, with the blade A, havinga hole, 2. through lthe same near one end, of the head l), having thestud 5 and shoulder 6,against which one edge of the blade A is heldfirmly by the stud passing through the hole in the blade, substantiallyas set forth.

2. The combination,with the blade A, having a hole through the same nearone end, of

i i i l l i i i the head 13,1nade in two parts, and the studs 5 and 7and screws or rivets by which the two parts of the head are con nectedtogether, there being a shoulder, t3, against which one edge of theblade A is pressed by the action of the stud 2 as the blade isintroduced into place, substantially as set forth.

3. rlhe combinatiomwith the blade A, having a hole through the same nearone end, ol."

the head-piece B, made in two parts divisible centrally upon the line ofthe blade and united together, there being a stud at 5 and a shoulder,(l, upon one of the parts at right angles to the edge of the head, andthe screws 15, passing through such shoulder 6 and against the edge ofthe plate, substantially as set forth.

4. The head-piece B, made of two parts, 3 and el, and hollow, therebeing studs upon one part passing into recesses upon the other part, andrivets or screws to connect the parts together, in combination with theblade A, introduced between the two parts and held in place,substantially as set forth.

Signed by lne this 17th day of March, lSSS.

' UANDOLPH HAYDEN.

Witnesses:

'EDWARD W. lumix, A n'No Ln H. Harmes'.

